Ma, H., Zhou, J., Zhao, Y., Wang, S., Hu, Z., Ma, J., & Cheng, H. (2024). Atomically Dispersed Mn‐Doped Ru@RuO2 Core/Shell Nanostructure with High Acidic Water Oxidation Performance Arising from Multiple Synergies. Small, 21(4). Portico. https://doi.org/10.1002/smll.202406353
Abstract:
AbstractThe high overpotential and unsatisfactory stability of RuO2‐based catalysts seriously hinder their application in acidic oxygen evolution reaction (OER). Herein, a Ru@RuO2 core/shell catalyst doped with atomically dispersed Mn species, denoted as Ru@Mn‐RuO2, is reported, which is prepared by a facile one‐pot method. Detailed structural characterizations confirm that Mn is homogeneously and atomically distributed in RuO2 shell, which causes lattice contraction of RuO2. The as‐prepared Ru@Mn‐RuO2 exhibits a very low overpotential of 190 mV at the current density of 10 mA cm−2 and an excellent stability of 360 h, far surpassing the control samples Ru@RuO2 without atomically dispersed Mn dopants and home‐made RuO2 nanoparticles without metallic Ru core. With the further assistance of density functional theory calculations, the enhanced OER activity of Ru@Mn‐RuO2 is attributed to multiple synergistic effects, including the MnOx‐Ru (oxide shell) synergy, MnOx‐Ru (metal core) synergy, and the Ru (core)‐RuO2 (shell) synergy. Besides, the atomically dispersed Mn doping can increase the formation energy of soluble Ru cations, thus leading to the excellent stability of the Ru@Mn‐RuO2 catalyst. This work shines light on the design of electrocatalysts with multiple synergistic effects towards efficient acid water splitting.
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Funding Info:
There was no specific funding for the research done
Description:
This is the peer reviewed version of the following article: Ma, H., Zhou, J., Zhao, Y., Wang, S., Hu, Z., Ma, J., & Cheng, H. (2024). Atomically Dispersed Mn‐Doped Ru@RuO2 Core/Shell Nanostructure with High Acidic Water Oxidation Performance Arising from Multiple Synergies. Small, 21(4). Portico, which has been published in final form at https://doi.org/10.1002/smll.202406353. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.